Pontiac 2008 Grand Prix Owner's Manual page 306

3.8L V6 Engine
5. Fill the radiator with the proper DEX-COOL
coolant mixture, up to the base of the filler neck.
See Engine Coolant on page 5-24 for more
information about the proper coolant mixture.
If you see a stream of coolant coming from the air
bleed valve, close the valve. Otherwise, close the
valve after the radiator is filled.
6. Rinse or wipe any spilled coolant from the engine
and the compartment.
5-36
7. Replace the engine cover.
7.1. Remove the oil fill tube, with cap attached,
7.2. Insert the catch tab on the engine cover
7.3. Place the hole in the engine cover over the
8. Then fill the coolant recovery tank to the COLD
FILL line.
9. Put the cap back on the coolant recovery tank, but
leave the pressure cap off.
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from the valve cover.
under the bracket on the engine.
hole in the valve cover. Install oil fill tube and
cap by twisting clockwise.